dazed and confused irule newbie http to https

Is the insecure content warning happening because the application is sending a redirect to an http URL hosted on the VIP? Or does the page content contains absolute references to http content (http://example.com/file.jpg for example)? If it's the former, you can rewrite the redirect if it contains your domain using a rule like this:

when HTTP_REQUEST {
    Save the requested host header value for reference in the response
   set host [HTTP::host]
}
when HTTP_RESPONSE {
    Check if this is a redirect (30x response status)
   if {[HTTP::is_redirect]}{
       Replace the http://host with https://host in the Location header
      HTTP::header replace Location [string map -nocase "http://$host" "https://$host" [HTTP::header value Location]]
   }
}

This assumes that you only want to rewrite the Location value from http to https if the host in the redirect Location header is what the client requested.

If the page content contains absolute references to http://, you can use a blank stream profile and an iRule to replace http with https in the response content. Check the STREAM::expression wiki page (Click here) for an example.

Aaron